.thinksite {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;

    .top {
        height: 100px;
    }

    .main {
        position: absolute;
        top: 100px;
        left: 0;
        right: 0;
        bottom: 0;

        .menus {
            border: solid;
            position: absolute;
            width: 200px;
            top: 0;
            left: 0;
            bottom: 0;
        }

        .content {
            border: solid;
            position: absolute;
            top: 0;
            left: 200px;
            bottom: 0;
            right: 0;

            iframe {
                width: 100%;
                height: 100%;

            }
        }
    }
}